Pocket-window.



E. H. LUNKEN.

POCKET WINDOW.

APPLICATION FILED MAR. I3, 1916.

Patented Y May 29, 1917.

EDMUND H. LUNKEN, or crncmmirr, onro.

POCKET-WINDOW.

To all whom it may concern Be it known that I, EDMUND H. LUNKEN,

a citizen of the United States, and a resident of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Pocket-WVindows, of which the following is a full, clear, and exact description, reference being had to the accompany- 7 10 ing drawings, forming part of this specification.

My invention relates to pocket wlndows of the type wherein there are two slidlng sashes which are adapted to slide into a pocket, thereby leaving the window opening unobscured. In windows of this type there must be some form of lock which engages with the frame of the window, because a locking of the two sashes together I in the usual manner will not prevent the raising or lowering of the sashes together, therebyleavmg an opening in the wlndow.

In such case one of the sashes will slide.

into the pocket, thereby permitting access through the window.

rails of the two sashes are beveled to keep out the weather as is customary in such sashes.

Accordingly it is my object to provide a lock for locking thetwo sashes together,

which lock may be automatically released to raise or lower the sash. If a spring lock were employed, there would be the necessity of holding open the lock and working with the sash to move it at the same time,

i 40 which operation is diflicult and annoying.

It is also my object to provide a meeting rail conformation which permits the sliding of the two sashes by each other in any direction, which conformation serves as an efficient weather seal when the two sashes are in normal position, locked together so as to close the entire window opening.

The reason why the pocket window in some of its various modifications has not become standard'for residencesis mainly because, first, the expense of installation of the complex structures so far provided, and second, because of the inconvenience of op eration of the window in ordinary use. It

is thus my object to do away with this second objection to pocket windows in pro- Specification of Letters Patent.

Patented Mayan, 1917.

Application filed. March 13, 1916. Serial No. 83,736.

viding an assembly and arrangement of parts which present'no complications to the' ordinary user. Thus in the mortise lock, that is to say the lock which holds the two sashes in position in the window frame, there is necessity of positively locking the device, but no necessity of positively unlocking it except by the manipulation of the sash. I propose to apply it to the upper sash, thereby permitting the use of the lower sash in the ordinary manner, just as in the usual sliding sash window of the present time.

The meeting rail structure is also designed to provide a weather seal, While at the same time permitting any desired adjustment of the sash, and at the same time permitting the manipulation of the sash which automatically unlocks the upper sash from its lock with the windowframe.

These various objects and other advantages to be noted I accomplish by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed.

In the drawings,

Figure 1 is a front elevation of the window, taken from the inside of a building.

Fig. 2 is a detail, vertical cross section, showing the lock for the upper sash.

F ig.'3 is a detail vertical section, taken through the sash to show the meeting rail structure.

I do not limit myself to any particular form of pocket window structure, as my invention is applicable to any form of pocket window wherein the sashes slide up i or down into a suitable pocket in the wall of a building. Thus in the form shown, the two sashes 1 and 2 slide on rails 3 which extend up into a pocket 4. The pulleys 5 for the sashes are located in the top of the pocket, thereby permitting both sashes to slide up into the pocket, thereby leaving the'opening in the window frame 6 perfectly other, and thereupon the operation of the lock will draw the tops of the curves together, forming a perfect weather seal. YVhen the lock in unfastened, however, the tops of the curves will rub past each other and thereby permit the upper sash 1 to be moved down from the upper side of the window without moving the lower sash. Thus the lower sash can be pushed up into the pocket, when washing, and the upper sash pulled to any position desired. So also with the opposite movement, the upper sash may be pushed up out of the way and the lower sash adjusted to any desired position.

The convenience of this method of operation is at once obvious, as at the present time the two sashes may be pushed only to a very limited number of positions, and are always in interference with each other.

The locking device which is to hold the two sashes in position against the frame of the window is mounted on the upper sash as heretofore mentioned. Lock plates 12, 12 are countersunk in the sides of the rails 3 of the frame at a .position preferably close above the position of the meeting rails of the sashes when they are locked together. These plates form beveled sockets for the locking pins, having the sloping walls 13, and the shoulders let. Plates 15 are set into the outer face ofthe upper sash rails 16. These plates have extending from the lower portionthereof the tubular members 17, in which slide the locking pins 18. The pins 18 have an extension 19, which fits through a contracted end 20 of the tubular member, thereby preventing the pulling out of the pins.

It will be noted that there is no spring to force the locking pins into the lock plates or sockets, automatically, such as is the usual practice in mortise locks of this type. By omitting the springs I accomplish a very valuable purpose in pocket windows as distinguished from any other art with which I am at'present familiar. Because of the fact that in sliding sash windows, it is possible and practical to provide for moving the upper sash down past the lower, it is possible for me to move the upper sash slightly down from its locked position, thereby permitting the pins to be forced inwardly out of locking position by means of the sloping faces 13 of the lock plates. The upper sash is thus freed to move into any position without manipulation of the locks in any way.

Moreover, in a pocket window of this type, the usual manipulations are with the lower sash and the upperv sash can be left locked to the window frame until it is desired to move it. WVhen locking the window, it is but little further effort to push in the Copies of this patent may be obtained for five cents each, by addressing the Commissioner lock pins, because it is necessary at such time to operate the cam lock, and accordingly the locking of the pins which are located conveniently for this purpose is but one further motion, without changing the position of the body.

It will be noted that the plates 15 extend up from the tubular members that receive the pins, thereby providing for the strain applied if the two sashes were to be forced up into the pocket without unlocking them, also that the shoulders in the locks are rounded to prevent catching of the locking pins when displaced.

I do not wish to be limited in the claims that follow to the exact structuredescribed in the foregoing specification, as the description refers but to the preferred form of my invention; on the contrary I wish to be entitled to the full scope of the doctrine of equivalents in the construction of my claims. Also I do not wish to be limited in my claims because of my failure at this time to appreciate the full usefulness of my invention, as I intend it to be used in the future in any manner that may turn out to be economical and convenient, and that mere mechanical changes necessary to adapt it to future uses be fully included in the scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a pocket window having a frame, in combination with two sliding sashes in said frame adapted to close the-window opening, means for locking the two sashes together, and pins slidably mounted in the upper sash, and lock plates in the frame of the window to receive said pins, said plates having recesses with a beveled lower face, for the purpose described.

2. In a pocket window, in combination with a frame having an opening, a wall pocket adjacent said frame, sliding sashes adapted to close the opening, means for lock ing the sashes together,and means for locking the sash nearest the pocket to the frame, said means adapted to be manually set into locking position and automatically moved out of locking position by moving the said sash away from the pocket.

3. In a pocket window, a pair of sliding sashes, a frame in which said sashes are mounted, a wall pocket for said sashes adjacent the frame, and means for locking one of the sashes to the frame, said means adapted to be automatically released by moving said sash in a direction away from the pocket so as to permit said sash to be moved into the pocket.

EDMUND H. LUNKEN.

of Patents, 

